Water-valve for instantaneous water-heaters.



E. RUUD 84 H. S. HUMPHREY.

WATER VALVE FOR INSTANTANEOUS WATER HEATERS.

APPLICATION FILED SEPT-28. I915.

LQW QWW Patented Feb. 26,1918.

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23' 246/ I I 23 \L 2/ 20 1 M 1 H 1 25 83' 33 r /)v A, 5 I 7 4w 7 11:; an em EDWIN RUUD, OF PITTSBURGH, PENNSYLVANIA, ANJDHERBERT S. HUMPHREY, 0F

KALAMAZOO, MICHIGAN, ASSIGNORS T0 RUUD MANUFACTURING GOMJPANY, 01E PITTSBURGH, PENNSYLVANIA, A CORPORATION OF N EW JERSEY.

WATER-VALVE INSTANTANEOUS WATER-HEATERS.

Specification of Letters Patent.

Patented Feb 26, T212 original application flied .i'une 15, 1915, Serial Ito. M350. Divided and this application filed September 28, 1915. Serial Ito. 53,070.

To all whom it may concern:

Be it known that we, EDWIN Rum), a citizen of the United States, and resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, and HERBERT S. HUMPHREY, a citizen of the United States, and resident of Kalamazoo, in the county of Kalamazoo and State of Michigan, have invented certain new and useful Improvements in Water-Valves for Instantaneous lVater-Heaters, the same being a division of our application filed June 15, 1915, Serial No. 345,250, of which the following is a specification. v

This invention has particular reference to the water valve which serves to actuate the gas valve, opening the latter for thepassage of gas to the burners when water is being delivered from the heater, and the primary object is to provide simple and eflicient means for passing water to the heater through the water valve without interfering with the gas-valve operating function of the latter.

Under certain conditions it is desirable to embody the water valve in a packed piston, and in order to preserve the packing the arrangement should be such as to avoid move ment of the packing over ports or ofi'sets in the casing in. which it travels. To accomplish this the piston itself must be ported for the passage of water therethrough in stead of therearound. The present inven tion is immediately concerned with a valve control of efiicient and novel form for the piston port; also to improved means for rendering operative the'gas-valve actuating stem.

In the accompanying drawings, Figure 1 is a vertical sectional view of a water valve embodying the invention, the same being illustrated in connection with a conventional form of gas valve. Fig. 2 is a vertical section of the water valve taken at right angles to Fig. 1 and with the piston lowered as when passing water through the pistoncarried check valve. Fig. 3 is a sectional plan taken on line 3-3 of Fig. 2.

Referring to the drawings, 1 desi nates a water valve casing having the =cyl1ndrical intermediate portion 2. @nc end of the easing is provided with a water inlet 3, and its opposite end with an outlet 4. As here without causing the packing to traverse either the inlet or the outlet ports.

Adapted to be actuated by piston 6 is stem 8 which alines with stem 9 of gas valve 10, the latter being conventionally shown as normally closing port 11 of gas chamber 12 under the influence of spring 13. The water and gas valve structures may be held in operative relation by any desired form of frame element or support such as bracket 14:. The cooperation of stems 8 and 9 and the sli ht independent movement of stem 8 afiorded by gap 15 are well understood in the art, and need not be described in detail.-

Piston 6 is formed with an upwardly disposed annular bulge or extension 20 having the rim-like seat-forming annular top edge 20 which encircles ports 21 and postways or openings 22. Rising centrally from the top of piston enlargement 20 is the hollow boss 23 which is arranged in the center of the group of ports 21 and 22, and secured therein by plug 23' is the headed upper extremity 8 of the gas-valve actuating stem 8, the latter extending downwardly through the outlet portion of casing 2.

The valve 24: for controlling ports 21 is of head or cap-like form, the same being fully exposed in the inlet portion of easing 2 and apertured centrally to slide on boss 23, the Valve when closed seating on rim 20. Within chamber 20 of the piston and depending therefrom is the tubular head 25 which is connected to valve 24 by means ofposts 26 which are movable through openings 22 in the top of chamber 20. The parts are secured together by screws 27 which extend through valve 24 and through the posts and into the laterally flanged upper end of head 25.

In operation, with the piston normally in the position shown in Fig. 1, the valve of relatively large area is held to its seat 20 by the water pressure at the inlet side of easing 2, the piston being held normally raise by spring 28. When the piston lowers and compresses spring 28 following withdrawal of water from the outlet portion of the casing, the valve remains closed until the tubular head 25 comes in contact with the -stop-forming boss 19 in the outlet portion of the casing, whereupon further downward movement of the valve is pre vented and the continued movement of the piston carries it away from the valve, leaving the latter elevated as in Fig. 2 so that water may freely pass through the piston ports 21. Upon stopping the withdrawal of water and equalizing the pressures on opposite sides of the piston, spring 28 returns the piston to its normal position shown in Fig. 1.

Among the advantages of this construction may be noted the simplicity of the parts and the relatively lar e areas of the valve and valve seat, where y secure closing of the valve is assured excepting when the piston has lowered sufliciently to open the valve. And when the valve is open there is ample port clearance for the water which is to pass through the piston.

We claim:

1. In a water valve for instantaneous water heaters, the combination of a casing having a water inlet and an outlet, 9. piston movable in the casing and having a valve seat at its inlet side with ports extending through the seat to the outlet side of the piston, a check valve fitting the seat and forming a cover for said ports adapted to open toward the casing inlet, a depending tailpiece carried by the check valve and extending toward the casing outlet, an abutment in the casing outlet adapted to be engaged by the tail-piece for lifting the valve from its seat, and a gas valve actuating stem operatively connected to the iston.

' 2. In a water valve or instantaneous water heaters, the combination of a casing having a water inlet and an outlet, a piston movable in the casing, the piston ported for the passage of water and provided with a port-surrounding valve seat facing the inlet portion of the casin the piston provided with guideways ara leling its direction of movement, a va ve adapted to cooperate with said seat for closing the ported piston to the passage of water, guides on the valve having limited movement in the guideways of the piston for controlling the opening movement of the valve, means for opening the valve upon moving the piston toward the casing outlet, and a gas-valve actuating stem operatively connected to the piston.

3. In a water valve for instantaneous water heaters, the combination of a casing having a water inlet and an outlet, a piston movable in the casing and provided at its side adjacent the caslng inlet with a valve seat and with ports extending through the seat to the outlet side of the piston, a valve for said seat and ports adapted to open toward the casing inlet, a valve carrier movable with and projecting from the piston toward the casing outlet, guides paralleling the axis of the piston and projecting from the carrier and movable throu h the valve seat and secured to the valve or directingthe opening and closing movements of the latter, and a gas-valve actuating stem operatively connected to the valve.

4. In a water valve for instantaneous water heaters, the combination of a casing having a water inlet and an outlet, a piston movable in the casing, the side of the piston disposed toward the casing inlet formed with an annular valve seat and with portformlng, passages opening through said seat and other passages which constitute guideways, a guide-forming projection extending centrally from the seat toward the inlet portion of the casing, a centrally a ertured valve movable on said guide and a apted to cover the seat, guide posts projecting from the valve through said guideways in the seat, a tubular carrier movably mounted at the side of the piston adjacent the casing outlet and to wh1ch said posts are secured, and a gas-valve actuating stem projecting from the piston and through said carrier.

In testlmony whereof we afiix our signatures in presence of two witnesses.

EDWIN RUUD. HERBERT S. HUMPHREY. Witnesses for Edwin Ruud:

D. A. HARDIE, P. A. MILM. Witnesses for Herbert S. Humphrey:

E. S. Emo'rr, B. M. SCHERER. 

